diff --git a/backend/src/data/entities/ScheduledPost.ts b/backend/src/data/entities/ScheduledPost.ts
index 1729bca7..c4b31c52 100644
--- a/backend/src/data/entities/ScheduledPost.ts
+++ b/backend/src/data/entities/ScheduledPost.ts
@@ -1,4 +1,4 @@
-import { MessageAttachment } from "discord.js";
+import { Attachment } from "discord.js";
 import { Column, Entity, PrimaryColumn, PrimaryGeneratedColumn } from "typeorm";
 import { StrictMessageContent } from "../../utils";
 
@@ -17,7 +17,7 @@ export class ScheduledPost {
 
   @Column("simple-json") content: StrictMessageContent;
 
-  @Column("simple-json") attachments: MessageAttachment[];
+  @Column("simple-json") attachments: Attachment[];
 
   @Column({ type: String, nullable: true }) post_at: string | null;
 
diff --git a/backend/src/plugins/Automod/triggers/matchAttachmentType.ts b/backend/src/plugins/Automod/triggers/matchAttachmentType.ts
index 142e7b0e..80154ec9 100644
--- a/backend/src/plugins/Automod/triggers/matchAttachmentType.ts
+++ b/backend/src/plugins/Automod/triggers/matchAttachmentType.ts
@@ -1,4 +1,4 @@
-import { Snowflake, TextChannel, Util } from "discord.js";
+import { escapeInlineCode, Snowflake, TextChannel } from "discord.js";
 import * as t from "io-ts";
 import { asSingleLine, messageSummary, verboseChannelMention } from "../../../utils";
 import { automodTrigger } from "../helpers";
@@ -71,7 +71,7 @@ export const MatchAttachmentTypeTrigger = automodTrigger<MatchResultType>()({
 
     return (
       asSingleLine(`
-        Matched attachment type \`${Util.escapeInlineCode(matchResult.extra.matchedType)}\`
+        Matched attachment type \`${escapeInlineCode(matchResult.extra.matchedType)}\`
         (${matchResult.extra.mode === "blacklist" ? "blacklisted" : "not in whitelist"})
         in message (\`${contexts[0].message!.id}\`) in ${prettyChannel}:
       `) + messageSummary(contexts[0].message!)
diff --git a/backend/src/plugins/Automod/triggers/matchLinks.ts b/backend/src/plugins/Automod/triggers/matchLinks.ts
index 248a19f3..f1270e7c 100644
--- a/backend/src/plugins/Automod/triggers/matchLinks.ts
+++ b/backend/src/plugins/Automod/triggers/matchLinks.ts
@@ -1,4 +1,3 @@
-import { Util } from "discord.js";
 import escapeStringRegexp from "escape-string-regexp";
 import * as t from "io-ts";
 import { allowTimeout } from "../../../RegExpRunner";
@@ -11,6 +10,7 @@ import { mergeRegexes } from "../../../utils/mergeRegexes";
 import { mergeWordsIntoRegex } from "../../../utils/mergeWordsIntoRegex";
 import { PhishermanPlugin } from "../../Phisherman/PhishermanPlugin";
 import { phishermanDomainIsSafe } from "../../../data/Phisherman";
+import { escapeInlineCode } from "discord.js";
 
 interface MatchResultType {
   type: MatchableTextType;
@@ -186,7 +186,7 @@ export const MatchLinksTrigger = automodTrigger<MatchResultType>()({
 
   renderMatchInformation({ pluginData, contexts, matchResult }) {
     const partialSummary = getTextMatchPartialSummary(pluginData, matchResult.extra.type, contexts[0]);
-    let information = `Matched link \`${Util.escapeInlineCode(matchResult.extra.link)}\``;
+    let information = `Matched link \`${escapeInlineCode(matchResult.extra.link)}\``;
     if (matchResult.extra.details) {
       information += ` ${matchResult.extra.details}`;
     }
diff --git a/backend/src/plugins/Automod/triggers/matchMimeType.ts b/backend/src/plugins/Automod/triggers/matchMimeType.ts
index 6e1b447e..6af0d381 100644
--- a/backend/src/plugins/Automod/triggers/matchMimeType.ts
+++ b/backend/src/plugins/Automod/triggers/matchMimeType.ts
@@ -1,7 +1,7 @@
 import { automodTrigger } from "../helpers";
 import * as t from "io-ts";
 import { asSingleLine, messageSummary, verboseChannelMention } from "../../../utils";
-import { GuildChannel, Util } from "discord.js";
+import { escapeInlineCode, GuildChannel } from "discord.js";
 
 interface MatchResultType {
   matchedType: string;
@@ -71,7 +71,7 @@ export const MatchMimeTypeTrigger = automodTrigger<MatchResultType>()({
 
     return (
       asSingleLine(`
-        Matched MIME type \`${Util.escapeInlineCode(matchedType)}\`
+        Matched MIME type \`${escapeInlineCode(matchedType)}\`
         (${mode === "blacklist" ? "blacklisted" : "not in whitelist"})
         in message (\`${message!.id}\`) in ${prettyChannel}
       `) + messageSummary(message!)
diff --git a/backend/src/plugins/Automod/triggers/matchWords.ts b/backend/src/plugins/Automod/triggers/matchWords.ts
index c7603496..c5ca79fc 100644
--- a/backend/src/plugins/Automod/triggers/matchWords.ts
+++ b/backend/src/plugins/Automod/triggers/matchWords.ts
@@ -1,4 +1,3 @@
-import { Util } from "discord.js";
 import escapeStringRegexp from "escape-string-regexp";
 import * as t from "io-ts";
 import { normalizeText } from "../../../utils/normalizeText";
diff --git a/backend/src/plugins/Automod/triggers/threadArchive.ts b/backend/src/plugins/Automod/triggers/threadArchive.ts
index d4ed631b..3e2d852f 100644
--- a/backend/src/plugins/Automod/triggers/threadArchive.ts
+++ b/backend/src/plugins/Automod/triggers/threadArchive.ts
@@ -1,5 +1,5 @@
 import { Snowflake } from "discord-api-types/v9";
-import { User, Util } from "discord.js";
+import { escapeBold, User } from "discord.js";
 import * as t from "io-ts";
 import { tNullable } from "../../../utils";
 import { automodTrigger } from "../helpers";
@@ -49,7 +49,7 @@ export const ThreadArchiveTrigger = automodTrigger<ThreadArchiveResult>()({
     const parentName = matchResult.extra.matchedThreadParentName;
     const base = `Thread **#${threadName}** (\`${threadId}\`) has been archived in the **#${parentName}** (\`${parentId}\`) channel`;
     if (threadOwner) {
-      return `${base} by **${Util.escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
+      return `${base} by **${escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
     }
     return base;
   },
diff --git a/backend/src/plugins/Automod/triggers/threadCreate.ts b/backend/src/plugins/Automod/triggers/threadCreate.ts
index c0ae6ad3..5c1b9ee0 100644
--- a/backend/src/plugins/Automod/triggers/threadCreate.ts
+++ b/backend/src/plugins/Automod/triggers/threadCreate.ts
@@ -1,5 +1,5 @@
 import { Snowflake } from "discord-api-types/v9";
-import { User, Util } from "discord.js";
+import { escapeBold, User } from "discord.js";
 import * as t from "io-ts";
 import { automodTrigger } from "../helpers";
 
@@ -41,7 +41,7 @@ export const ThreadCreateTrigger = automodTrigger<ThreadCreateResult>()({
     const parentName = matchResult.extra.matchedThreadParentName;
     const base = `Thread **#${threadName}** (\`${threadId}\`) has been created in the **#${parentName}** (\`${parentId}\`) channel`;
     if (threadOwner) {
-      return `${base} by **${Util.escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
+      return `${base} by **${escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
     }
     return base;
   },
diff --git a/backend/src/plugins/Automod/triggers/threadDelete.ts b/backend/src/plugins/Automod/triggers/threadDelete.ts
index cecb5862..3e1fd2dc 100644
--- a/backend/src/plugins/Automod/triggers/threadDelete.ts
+++ b/backend/src/plugins/Automod/triggers/threadDelete.ts
@@ -1,5 +1,5 @@
 import { Snowflake } from "discord-api-types/v9";
-import { User, Util } from "discord.js";
+import { escapeBold, User } from "discord.js";
 import * as t from "io-ts";
 import { automodTrigger } from "../helpers";
 
@@ -40,7 +40,7 @@ export const ThreadDeleteTrigger = automodTrigger<ThreadDeleteResult>()({
     const parentId = matchResult.extra.matchedThreadParentId;
     const parentName = matchResult.extra.matchedThreadParentName;
     if (threadOwner) {
-      return `Thread **#${threadName ?? "Unknown"}** (\`${threadId}\`) created by **${Util.escapeBold(
+      return `Thread **#${threadName ?? "Unknown"}** (\`${threadId}\`) created by **${escapeBold(
         threadOwner.tag,
       )}** (\`${threadOwner.id}\`) in the **#${parentName}** (\`${parentId}\`) channel has been deleted`;
     }
diff --git a/backend/src/plugins/Automod/triggers/threadUnarchive.ts b/backend/src/plugins/Automod/triggers/threadUnarchive.ts
index ce3adf81..e50e8186 100644
--- a/backend/src/plugins/Automod/triggers/threadUnarchive.ts
+++ b/backend/src/plugins/Automod/triggers/threadUnarchive.ts
@@ -1,5 +1,5 @@
 import { Snowflake } from "discord-api-types/v9";
-import { User, Util } from "discord.js";
+import { escapeBold, User } from "discord.js";
 import * as t from "io-ts";
 import { tNullable } from "../../../utils";
 import { automodTrigger } from "../helpers";
@@ -49,7 +49,7 @@ export const ThreadUnarchiveTrigger = automodTrigger<ThreadUnarchiveResult>()({
     const parentName = matchResult.extra.matchedThreadParentName;
     const base = `Thread **#${threadName}** (\`${threadId}\`) has been unarchived in the **#${parentName}** (\`${parentId}\`) channel`;
     if (threadOwner) {
-      return `${base} by **${Util.escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
+      return `${base} by **${escapeBold(threadOwner.tag)}** (\`${threadOwner.id}\`)`;
     }
     return base;
   },
diff --git a/backend/src/plugins/Cases/functions/getCaseEmbed.ts b/backend/src/plugins/Cases/functions/getCaseEmbed.ts
index 5a1b2ab8..45550ef8 100644
--- a/backend/src/plugins/Cases/functions/getCaseEmbed.ts
+++ b/backend/src/plugins/Cases/functions/getCaseEmbed.ts
@@ -1,4 +1,4 @@
-import { MessageEditOptions, MessageOptions, Util } from "discord.js";
+import { escapeCodeBlock, MessageEditOptions, MessageOptions } from "discord.js";
 import { GuildPluginData } from "knub";
 import moment from "moment-timezone";
 import { CaseTypes } from "../../../data/CaseTypes";
@@ -67,7 +67,7 @@ export async function getCaseEmbed(
   if (theCase.notes.length) {
     for (const note of theCase.notes) {
       const noteDate = moment.utc(note.created_at);
-      let noteBody = Util.escapeCodeBlock(note.body.trim());
+      let noteBody = escapeCodeBlock(note.body.trim());
       if (noteBody === "") {
         noteBody = emptyEmbedValue;
       }
diff --git a/backend/src/plugins/Logs/LogsPlugin.ts b/backend/src/plugins/Logs/LogsPlugin.ts
index e0c39d35..618d9f7c 100644
--- a/backend/src/plugins/Logs/LogsPlugin.ts
+++ b/backend/src/plugins/Logs/LogsPlugin.ts
@@ -35,7 +35,6 @@ import { log } from "./util/log";
 import { onMessageDelete } from "./util/onMessageDelete";
 import { onMessageDeleteBulk } from "./util/onMessageDeleteBulk";
 import { onMessageUpdate } from "./util/onMessageUpdate";
-import { Util } from "discord.js";
 import {
   createTypedTemplateSafeValueContainer,
   TemplateSafeValueContainer,
@@ -113,6 +112,7 @@ import { logVoiceChannelMove } from "./logFunctions/logVoiceChannelMove";
 import { logMemberTimedUnban } from "./logFunctions/logMemberTimedUnban";
 import { logDmFailed } from "./logFunctions/logDmFailed";
 import { InternalPosterPlugin } from "../InternalPoster/InternalPosterPlugin";
+import { escapeCodeBlock } from "discord.js";
 
 const defaultOptions: PluginOptions<LogsPluginType> = {
   config: {
@@ -300,7 +300,7 @@ export const LogsPlugin = zeppelinGuildPlugin<LogsPluginType>()({
             The following regex has taken longer than ${timeoutMs}ms for ${failedTimes} times and has been temporarily disabled:
           `.trim() +
             "\n```" +
-            Util.escapeCodeBlock(regexSource) +
+            escapeCodeBlock(regexSource) +
             "```",
         }),
       );
diff --git a/backend/src/plugins/ModActions/functions/formatReasonWithAttachments.ts b/backend/src/plugins/ModActions/functions/formatReasonWithAttachments.ts
index 77194a3f..3fd92ee8 100644
--- a/backend/src/plugins/ModActions/functions/formatReasonWithAttachments.ts
+++ b/backend/src/plugins/ModActions/functions/formatReasonWithAttachments.ts
@@ -1,6 +1,6 @@
-import { MessageAttachment } from "discord.js";
+import { Attachment } from "discord.js";
 
-export function formatReasonWithAttachments(reason: string, attachments: MessageAttachment[]) {
+export function formatReasonWithAttachments(reason: string, attachments: Attachment[]) {
   const attachmentUrls = attachments.map((a) => a.url);
   return ((reason || "") + " " + attachmentUrls.join(" ")).trim();
 }
diff --git a/backend/src/plugins/Post/commands/ScheduledPostsListCmd.ts b/backend/src/plugins/Post/commands/ScheduledPostsListCmd.ts
index a0a88766..c118440f 100644
--- a/backend/src/plugins/Post/commands/ScheduledPostsListCmd.ts
+++ b/backend/src/plugins/Post/commands/ScheduledPostsListCmd.ts
@@ -1,4 +1,4 @@
-import { Util } from "discord.js";
+import { escapeCodeBlock } from "discord.js";
 import humanizeDuration from "humanize-duration";
 import moment from "moment-timezone";
 import { createChunkedMessage, DBDateFormat, deactivateMentions, sorter, trimLines } from "../../../utils";
@@ -26,7 +26,7 @@ export const ScheduledPostsListCmd = postCmd({
 
       const isTruncated = previewText.length > SCHEDULED_POST_PREVIEW_TEXT_LENGTH;
 
-      previewText = Util.escapeCodeBlock(deactivateMentions(previewText))
+      previewText = escapeCodeBlock(deactivateMentions(previewText))
         .replace(/\s+/g, " ")
         .slice(0, SCHEDULED_POST_PREVIEW_TEXT_LENGTH);
 
diff --git a/backend/src/plugins/Post/util/postMessage.ts b/backend/src/plugins/Post/util/postMessage.ts
index 4a10f809..dd5cca03 100644
--- a/backend/src/plugins/Post/util/postMessage.ts
+++ b/backend/src/plugins/Post/util/postMessage.ts
@@ -1,7 +1,7 @@
 import {
+  Attachment,
   GuildTextBasedChannel,
   Message,
-  MessageAttachment,
   MessageOptions,
   NewsChannel,
   TextChannel,
@@ -19,7 +19,7 @@ export async function postMessage(
   pluginData: GuildPluginData<PostPluginType>,
   channel: GuildTextBasedChannel,
   content: MessageOptions,
-  attachments: MessageAttachment[] = [],
+  attachments: Attachment[] = [],
   enableMentions: boolean = false,
 ): Promise<Message> {
   if (typeof content === "string") {
diff --git a/backend/src/plugins/Slowmode/commands/SlowmodeSetCmd.ts b/backend/src/plugins/Slowmode/commands/SlowmodeSetCmd.ts
index d86a59f0..70f20fbd 100644
--- a/backend/src/plugins/Slowmode/commands/SlowmodeSetCmd.ts
+++ b/backend/src/plugins/Slowmode/commands/SlowmodeSetCmd.ts
@@ -1,4 +1,11 @@
-import { ChannelType, GuildTextBasedChannel, PermissionsBitField, TextChannel, ThreadChannel, Util } from "discord.js";
+import {
+  ChannelType,
+  escapeInlineCode,
+  GuildTextBasedChannel,
+  PermissionsBitField,
+  TextChannel,
+  ThreadChannel,
+} from "discord.js";
 import humanizeDuration from "humanize-duration";
 import { commandTypeHelpers as ct } from "../../../commandTypes";
 import { sendErrorMessage, sendSuccessMessage } from "../../../pluginUtils";
@@ -132,7 +139,7 @@ export const SlowmodeSetCmd = slowmodeCmd({
           rateLimitPerUser: rateLimitSeconds,
         });
       } catch (e) {
-        sendErrorMessage(pluginData, msg.channel, `Failed to set native slowmode: ${Util.escapeInlineCode(e.message)}`);
+        sendErrorMessage(pluginData, msg.channel, `Failed to set native slowmode: ${escapeInlineCode(e.message)}`);
         return;
       }
     } else {
diff --git a/backend/src/plugins/TimeAndDate/commands/SetTimezoneCmd.ts b/backend/src/plugins/TimeAndDate/commands/SetTimezoneCmd.ts
index d88a0740..90d00b3b 100644
--- a/backend/src/plugins/TimeAndDate/commands/SetTimezoneCmd.ts
+++ b/backend/src/plugins/TimeAndDate/commands/SetTimezoneCmd.ts
@@ -1,4 +1,4 @@
-import { Util } from "discord.js";
+import { escapeInlineCode } from "discord.js";
 import { commandTypeHelpers as ct } from "../../../commandTypes";
 import { sendErrorMessage, sendSuccessMessage } from "../../../pluginUtils";
 import { trimLines } from "../../../utils";
@@ -20,7 +20,7 @@ export const SetTimezoneCmd = timeAndDateCmd({
         pluginData,
         message.channel,
         trimLines(`
-        Invalid timezone: \`${Util.escapeInlineCode(args.timezone)}\`
+        Invalid timezone: \`${escapeInlineCode(args.timezone)}\`
         Zeppelin uses timezone locations rather than specific timezone names.
         See the **TZ database name** column at <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones> for a list of valid options.
       `),
diff --git a/backend/src/plugins/Utility/commands/JumboCmd.ts b/backend/src/plugins/Utility/commands/JumboCmd.ts
index d07855c1..867ac321 100644
--- a/backend/src/plugins/Utility/commands/JumboCmd.ts
+++ b/backend/src/plugins/Utility/commands/JumboCmd.ts
@@ -1,4 +1,4 @@
-import { MessageAttachment } from "discord.js";
+import { Attachment, AttachmentBuilder } from "discord.js";
 import fs from "fs";
 import photon from "@silvia-odwyer/photon-node";
 import twemoji from "twemoji";
@@ -50,7 +50,7 @@ export const JumboCmd = utilityCmd({
     const emojiRegex = new RegExp(`(<.*:).*:(\\d+)`);
     const results = emojiRegex.exec(args.emoji);
     let extension = ".png";
-    let file: MessageAttachment | undefined;
+    let file: AttachmentBuilder | undefined;
 
     if (!isEmoji(args.emoji)) {
       sendErrorMessage(pluginData, msg.channel, "Invalid emoji");
@@ -65,10 +65,10 @@ export const JumboCmd = utilityCmd({
       url += `${results[2]}${extension}`;
       if (extension === ".png") {
         const image = resizeBuffer(await getBufferFromUrl(url), size, size);
-        file = new MessageAttachment(image, `emoji${extension}`);
+        file = new AttachmentBuilder(image, { name: `emoji${extension}` });
       } else {
         const image = await getBufferFromUrl(url);
-        file = new MessageAttachment(image, `emoji${extension}`);
+        file = new AttachmentBuilder(image, { name: `emoji${extension}` });
       }
     } else {
       let url = `${twemoji.base}${twemoji.size}/${twemoji.convert.toCodePoint(args.emoji)}${twemoji.ext}`;
@@ -87,7 +87,7 @@ export const JumboCmd = utilityCmd({
         return;
       }
 
-      file = new MessageAttachment(image, "emoji.png");
+      file = new AttachmentBuilder(image, { name: "emoji.png" });
     }
 
     msg.channel.send({ files: [file] });
diff --git a/backend/src/plugins/Utility/commands/NicknameCmd.ts b/backend/src/plugins/Utility/commands/NicknameCmd.ts
index f689a6af..6f4b6073 100644
--- a/backend/src/plugins/Utility/commands/NicknameCmd.ts
+++ b/backend/src/plugins/Utility/commands/NicknameCmd.ts
@@ -1,8 +1,8 @@
-import { Util } from "discord.js";
 import { commandTypeHelpers as ct } from "../../../commandTypes";
 import { errorMessage } from "../../../utils";
 import { canActOn, sendSuccessMessage } from "../../../pluginUtils";
 import { utilityCmd } from "../types";
+import { escapeBold } from "discord.js";
 
 export const NicknameCmd = utilityCmd({
   trigger: ["nickname", "nick"],
@@ -20,7 +20,7 @@ export const NicknameCmd = utilityCmd({
       if (!args.member.nickname) {
         msg.channel.send(`<@!${args.member.id}> does not have a nickname`);
       } else {
-        msg.channel.send(`The nickname of <@!${args.member.id}> is **${Util.escapeBold(args.member.nickname)}**`);
+        msg.channel.send(`The nickname of <@!${args.member.id}> is **${escapeBold(args.member.nickname)}**`);
       }
       return;
     }
diff --git a/backend/src/utils.ts b/backend/src/utils.ts
index 692c67a6..e1324c7a 100644
--- a/backend/src/utils.ts
+++ b/backend/src/utils.ts
@@ -4,6 +4,7 @@ import {
   Constants,
   DiscordAPIError,
   Emoji,
+  escapeCodeBlock,
   Guild,
   GuildAuditLogs,
   GuildAuditLogsEntry,
@@ -15,7 +16,6 @@ import {
   InviteGuild,
   LimitedCollection,
   Message,
-  MessageAttachment,
   MessageEmbed,
   MessageEmbedOptions,
   MessageMentionOptions,
@@ -27,7 +27,6 @@ import {
   TextChannel,
   ThreadChannel,
   User,
-  Util,
 } from "discord.js";
 import emojiRegex from "emoji-regex";
 import { either } from "fp-ts/lib/Either";
@@ -258,7 +257,7 @@ export function nonNullish<V>(v: V): v is NonNullable<V> {
 export type GuildInvite = Invite & { guild: InviteGuild | Guild };
 export type GroupDMInvite = Invite & {
   channel: PartialChannelData;
-  type: typeof Constants.ChannelTypes.GROUP_DM;
+  type: typeof ChannelType.GroupDM;
 };
 
 /**
@@ -648,7 +647,7 @@ interface MatchedURL extends URL {
 }
 
 export function getUrlsInString(str: string, onlyUnique = false): MatchedURL[] {
-  let matches = str.match(urlRegex) || [];
+  let matches = [...str.match(urlRegex)];
   if (onlyUnique) {
     matches = unique(matches);
   }
@@ -1409,11 +1408,11 @@ export async function confirm(channel: TextChannel, userId: string, content: Mes
 
 export function messageSummary(msg: SavedMessage) {
   // Regular text content
-  let result = "```\n" + (msg.data.content ? Util.escapeCodeBlock(msg.data.content) : "<no text content>") + "```";
+  let result = "```\n" + (msg.data.content ? escapeCodeBlock(msg.data.content) : "<no text content>") + "```";
 
   // Rich embed
   const richEmbed = (msg.data.embeds || []).find((e) => (e as MessageEmbed).type === "rich");
-  if (richEmbed) result += "Embed:```" + Util.escapeCodeBlock(JSON.stringify(richEmbed)) + "```";
+  if (richEmbed) result += "Embed:```" + escapeCodeBlock(JSON.stringify(richEmbed)) + "```";
 
   // Attachments
   if (msg.data.attachments && msg.data.attachments.length) {